Søren Jessen

Søren Jessen is an Associate Professor in the Department of Geosciences and Natural Resource Management at the University of Copenhagen's Faculty of Science. His research focuses on nutrient and element cycling in freshwater, estuarine, and marine environments, with expertise in reactive transport modeling and stable isotopes of water. He teaches BSc courses in Danish including Hydrogeological field course and Geodata analysis using Python, and MSc courses in English including Contaminant Hydrogeology and Aqueous Geochemistry, which attracts external MSc and PhD students.

His research interests center on hydrological processes, particularly using water isotopes and major chemistry as tracers in hydrology, enhanced weathering applications, and reactive transport modeling. His work spans field studies, laboratory experiments, and computational modeling to understand complex water-environment interactions across various spatial and temporal scales.

Analysis of his recent publications (2022-2025) reveals strong focus areas in stable isotope hydrology, wetland restoration impacts on greenhouse gas emissions, nitrate transport in agricultural systems, and analytical methods for environmental tracers. His research demonstrates interdisciplinary connections between hydrology, geochemistry, and climate science, with field sites spanning Denmark, Iran, and Vietnam.

As an educator, Jessen actively engages with students through both field courses and computational approaches to geoscience. His external position as Researcher at the Geological Survey of Denmark and Greenland from 2009-2012 provided foundational experience for his current academic work. His research has gained significant attention with publications referenced in Wikipedia, picked up by news outlets, and widely shared on social media platforms.

His laboratory work focuses on water resources research, particularly examining the intersection of physical hydrology with biogeochemical processes. His team investigates how anthropogenic activities affect natural water systems and develops methods to trace these impacts through innovative isotopic and chemical approaches.